159907778893 has 4 divisors (see below), whose sum is σ = 160003936768. Its totient is φ = 159811621020.

The previous prime is 159907778881. The next prime is 159907778897. The reversal of 159907778893 is 398877709951.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-159907778893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (159907778897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48076443 + ... + 48079768.

It is an arithmetic number, because the mean of its divisors is an integer number (40000984192).

Almost surely, 2^159907778893 is an apocalyptic number.

It is an amenable number.

159907778893 is a deficient number, since it is larger than the sum of its proper divisors (96157875).

159907778893 is an equidigital number, since it uses as much as digits as its factorization.

159907778893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96157874.

The product of its (nonzero) digits is 240045120, while the sum is 73.

The spelling of 159907778893 in words is "one hundred fifty-nine billion, nine hundred seven million, seven hundred seventy-eight thousand, eight hundred ninety-three".